据油气新闻7月12日消息，Welltec公司宣布已于2019年第二季度在刚果共和国完成非骨水泥完井的首次部署。

凭借2017年第一季度在莫霍北阿尔比安油田持续部署Welltec环形屏障（WAB）的经验，刚果道达尔勘探开发公司通过在裸眼井中使用Welltec环形隔离（WAI）部署全球首个非骨水泥完井，进一步推动了金属可扩展环形密封技术的发展。

WAI使用多个金属可膨胀封隔器,实现了长距离裸眼分层隔离，以取代传统水泥的作用，从而显著提高油井整体施工效率。

它显著减少了衬管/套管和裸眼之间的自由环空，这对于需要选择性生产、增产或堵水的不同渗透率的高度分层的油藏是有益的。

除了效率提升之外，WAI实现的简化完井作业还消除了枯竭和超压油藏固井过程中存在的多种作业风险。

刚果道达尔勘探开发公司钻井和完井经理Ronan Bouget称：“公司利用创新技术和方法不断改进莫霍北阿尔比安油田开发项目的钻井曲线，我们是Welltec WAB技术的早期采用者，该技术在刚果共和国主要石油项目的开发过程中帮助确保了区域隔离和环形密封（衬管到地层）。

WAI作为全球效率驱动的一部分进行部署，旨在减少钻井支出，同时在这个高度异质的碳酸盐岩油田中保持有利的产能指数。由Manfred Bledou领导的Albian Asset团队和由Guillaume Viger领导的完井部门与Welltec合作开发了该项技术。 WAI的简单性使我们能够在没有操作问题的情况下首次成功部署该技术。我们对钻井的施工记录进行了阶段性改进，并计划在后续的油井中部署WAI--尤其是那些被确定为高风险的油井。”

非洲Welltec高级副总裁Gbenga Onadeko解释道：“WAI技术无疑将改变未来该行业油井的建造方式，我们为能与刚果道达尔勘探开发公司合作感到自豪，这表明我们有能力部署带来巨大变革的创新，这些创新可以简化、消除风险并提高运营效率。这是WAI技术在世界上的首次部署，对我们的使命非常重要——开发和交付突破性的解决方案，使我们的客户能够优化其资产的管理和开发。”

裘寅 编译自 油气新闻

原文如下：

Total E&P Congo Successfully Deploys World’s First Cementless Completion

Welltec has announced the first deployment of a truly cementless completion in the Republic of Congo during the second quarter of 2019.

Building on the experience gained through the continuous deployment of the Welltec Annular Barrier (WAB) in Moho North Albian field, which was awarded the first quarter of 2017, Total E&P Congo has pushed the boundaries of Metal Expandable Annular Sealing technology even further by deploying the world’s first cementless completion using the Welltec Annular Isolation (WAI) in open hole.

The WAI uses multiple metal expandable packers to provide long length open hole zonal isolation to replace the functions of traditional cement, leading to significant gains in efficiency in the overall well construction process.

It significantly reduces the free annulus space between the liner/casing and the open hole which can be beneficial in highly layered reservoirs of varying permeability where selective production, stimulation or water shut off is required.

In addition to the efficiency gains, the simplified well completions operations enabled by the WAI eliminated multiple operational risks associated with the cementing process in depleted and over-pressured reservoirs.

“Total E&P Congo have utilized innovative technologies and methods to continually improve the drilling curve on the Moho North Albian field development project,” says Ronan Bouget, the Drilling and Completions Manager of Total E&P Congo. “We were early adopters of Welltec’s WAB technology which has assisted in ensuring zonal isolation and annular sealing (liner to formation) during the development of our major oil project in the Republic of Congo. The WAI was deployed as part of the global efficiency drive to reduce drilling expenditure whilst maintaining the beneficial productivity index in this highly heterogenous carbonate field. Our Albian Asset team led by Manfred Bledou and the completion department led by Guillaume Viger worked with Welltec to develop the technology. The simplicity of the WAI enabled us to successfully deploy the technology the first time without operational issues. We delivered a step change improvement in our well construction record and plan to deploy the WAI in subsequent wells - especially those identified as high-risk.”

“The WAI technology will without doubt transform how future wells are constructed in the industry,” explains ‘Gbenga Onadeko, senior V.P., Welltec Africa. “We are proud of this collaboration with Total E&P Congo to demonstrate our ability to deploy game-changing innovation that can simplify, eliminate risks and enhance operational efficiency. This world-first deployment of the WAI technology is very important as we progress our mission - to develop and deliver ground-breaking solutions which enable our client to optimize the management and development of their assets.”